20268785 has 12 divisors (see below), whose sum is σ = 25055604. Its totient is φ = 15729120.

The previous prime is 20268769. The next prime is 20268791. The reversal of 20268785 is 58786202.

It can be written as a sum of positive squares in 2 ways, for example, as 13256881 + 7011904 = 3641^2 + 2648^2 .

It is not a de Polignac number, because 20268785 - 2⁴ = 20268769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61070 + ... + 61400.

It is an arithmetic number, because the mean of its divisors is an integer number (2087967).

Almost surely, 2^20268785 is an apocalyptic number.

It is an amenable number.

20268785 is a deficient number, since it is larger than the sum of its proper divisors (4786819).

20268785 is an frugal number, since it uses more digits than its factorization.

20268785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 20268785 is about 4502.0867383914. The cubic root of 20268785 is about 272.6523458649.

The spelling of 20268785 in words is "twenty million, two hundred sixty-eight thousand, seven hundred eighty-five".